Windows NT 4.0 Tcpip.sys Hotfixes Dated 4/28/99 to 5/28/99 Replaced

ID: Q234593

The information in this article applies to:

SYMPTOMS

Post-SP5 hotfixes for the Tcpip.sys driver dated April 28, 1999 to May 28, 1999 contain a regression that could cause your multiprocessor computer to stop responding (hang).


CAUSE

This problem occurs because of changes made in earlier hotfixes included an error in locking code. This error can cause your multiprocessor computer to "deadlock" or hang.


RESOLUTION

A supported fix that corrects this problem is now available from Microsoft, but it has not been fully regression tested and should be applied only to systems experiencing this specific problem. If you are not severely affected by this specific problem, Microsoft recommends that you wait for the next Windows NT 4.0 service pack that contains this fix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information on support costs, please go to the following address on the World Wide Web:

http://www.microsoft.com/support/supportnet/overview/overview.asp
The English version of this fix should have the following file attributes or later:

   Date      Time      Size      File name   Platform
   ---------------------------------------------------
   06/04/99   12:12p   150,768   Tcpip.sys   x86
   06/04/99   12:11p   273,968   Tcpip.sys   Alpha

NOTE: If this product was already installed on your computer when you purchased it from the Original Equipment Manufacturer (OEM) and you need this fix, please call the Pay Per Incident number listed on the above Web site. If you contact Microsoft to obtain this fix, and if it is determined that you only require the fix you requested, no fee will be charged. However, if you request additional technical support, and if your no-charge technical support period has expired, or if you are not eligible for standard no-charge technical support, you may be charged a non-refundable fee.

For more information about eligibility for no-charge technical support, see the following article in the Microsoft Knowledge Base:
Q154871 Determining If You Are Eligible for No-Charge Technical Support


STATUS

Microsoft has confirmed this to be a problem in Windows NT 4.0.


MORE INFORMATION

These hotfix files should be replaced with the newer files.

Affected hotfixes are described by the following articles:

Q223450 TCP Initial Retransmission Timer Adjustment Added to Windows NT
Q224585 TCB Hash Function Modified to Improve Network Performance
Q230307 Slow Performance in TCP/IP When Reconnecting
Q230381 TCP/IP Dead Gateway Detection May Not Work if ARP Cache Empty
Q232512 TCP/IP May Retransmit Packets Prematurely

Additional query words: multi processor multi-processor 


Keywords          : kbbug4.00 kbfix4.00 
Version           : winnt:4.0 SP5
Platform          : winnt 
Issue type        : kbbug

Last Reviewed: July 2, 1999